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                [Wf2015]Asteroids                </h1>
                <p>时间限制：2s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><p>&nbsp;<span style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;">二维平面上有2个凸多边形，每个凸多边形在x,y方向上都有一个速度，求两个凸多边形的交的面积最大的时刻。<br />
</span></p>
<div style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;"></div></p><hr/><h3>输入格式</h3><p><p>&nbsp;<span style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;">输入共2行，分别描述2个凸多边形。每行的第一个正整数N(3 &lt;= N &lt;= 10)表示多边形的点数，接下来N对整数x_i,y_i表示多边形每个顶点的坐标（按顺时针给出）。每行的最后有2个整数v_x,v_y,代表多边形在x方向与y方向上每秒移动的距离。<br />
</span></p>
<div style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;"></div></p><hr/><h3>输出格式</h3><p><p>&nbsp;<span style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;">如果两个凸多边形永远不会相交，则输出&quot;never&quot;，否则输出使</span><span style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 1.5;">2个凸多边形的交的面积最大的时刻，与标准答案相差不超过1e-3即可。<br />
</span></p>
<div style="font-family: Helvetica, 'Microsoft Yahei', verdana; font-size: 14px; line-height: 19.16666603088379px;"></div></p><hr/><h3>样例输入</h3><pre>输入1
6 3 2 2 4 3 6 6 6 7 4 6 2 2 2
4 18 5 22 9 26 5 22 1 -2 1
输入2
4 0 0 0 2 2 2 2 0 -1 1
4 10 0 10 2 12 2 12 0 1 1 </pre><hr/><h3>样例输出</h3><pre>输出1
4.193518
输出2
never </pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>鸣谢pyz5715提供SPJ及题面</p>
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